Stanstead Plain, QuebecStanstead Plain is an unincorporated community in Quebec, Canada. It is recognized as a designated place by Statistics Canada.DemographicsIn the 2021 Census of Population conducted by Statistics Canada, Stanstead Plain had a population of 1,030 living in 459 of its 484 total private dwellings, a change of from its 2016 population of 1,037. With a land area of, it had a population density of in 2021.